I've ported dingux-msx to the RS07. Download it here:https://github.com/bopbopbopbop/dingux-msx/releases/tag/0.2RS07
Run the application by unzipping the contents of the folder on to your RS07, and running the file dingux-msx.dge
To create an icon for emulator in gmenunx, copy the dingux-msx directory to your emu folder, and create a link to dingux-msx.dge for an icon.
Save roms in a roms directory INSIDE the dingux msx directory as the file picker lacks the ability to back out of the dingux-msx directory.
Different screen resolutions are available.
Pads are not yet supported.
Let me know of any issues.